Question

Which of the following is false concerning mutations?

1) If a point substitution changed the DNA so that his RNA codon is made,5'-UGA-3", it would likely have a catastrophic result.

2) Point insertions cause a frame shift

3) Point deletions cause a frame shift

4) If a mutations is silent, only one amino acid of the protein is changed.

5) A frame shift is usually catastrophic.

What is it called when RNA is made based on the DNA code? What type of RNA brings the genetic information from the nucleus to the ribosome for protein synthesis?

Answer 1

1. Answer: Option 4 is correct
Explanation:
UGA = Termination codon;
The entire protein is not synthesized.

Insertions and deletions not in multiples of three bases cause frame-shift. A frame-shift mutation is usually catastrophic as the entire amino acid sequence is altered.

Silent mutation does not alter the amino acid sequence
GGG ---> GGC: Both codons specify the same amino acid = Glycine

DNA ---> RNA: Transcription
Mediated by RNA polymerase
It occurs in the nucleus in eukaryotes.

The messenger RNA (mRNA) brings the information from the nucleus to the cytoplasm for protein synthesis.
i.e. The mRNA serves as the template for protein synthesis.